A uniform ladder is 10 cm long and weights 400 N. It rests with ists upper end against a frictionless vertical wall. Its lower end rests on the ground and is prevented from slipping by a peg driven into the ground. The ladder makes a 30 degrees angle with the horizontal. The force exerted on the wall by the ladder is:

Question

A uniform ladder is 10 cm long and weights 400 N. It rests with ists upper end against a frictionless vertical wall. Its lower end rests on the ground and is prevented from slipping by a peg driven into the ground. The ladder makes a 30 degrees angle with the horizontal. The force exerted on the wall by the ladder is: 
a 48N 
b 74N 
c 120N 
d 350N 
e 610N

Calculate the total horizontal forces. Remember that the sum of all forces is always zero.

I think you will have to sum moments also here, I suggest you sum moments about the ladder on the ground point. Also, you have vertical forces summing to zero also.

b · Accepted Answer

200

Dru · Answer

D 350 Solve for Fh and plug in the other values Fh*L*sin(theta)=w*(L/2)*cos(theta)